Yeah, you definitely don't want to mess up your...shifter.
The top tube on my bike eventually separated at the head tube from slamming down after popping too many wheelies. Sure, I noticed it cracking, but y'know, it wasn't all the way through, yet. Then I clipped that tree on a trail in a turn, so that the head tube angled back and the forks would only rotate so far. It would only ride in a left-hand circle after that...